Pressure and vacuum control valve



L; w. BROWNE PRESSURE AND VACUUM CONTROL VALVE Z; fiw

Filed Nov. 5, 1926 March 8 1927- Patented an. 8, 1927.

LYLE W. BROWNE, F. MARSHALLTOWN, IOWA, ASSIGNOR TO THE FISHER GOVERNOR COMPANY, OF MARSHALL'TOWN, IOWA.

PRESSURE AN'D VACUUM CONTROL VALVE.

Application filed November The object of my invention is to provide a pressure and vacuum control valve structure particularly including a valve adapted to be adjusted for use in controlling pressure or vacuum in a fluid conducting line.

Another object is to provide in such a valve a number of features of novel structure, which make it simple and inexpensive to manufacture and install, readily adjust- Hill-lyBfibCtiVQ for use, and available for controlling the wide range of pressure and vacuum.

With these and other objects in view, my invention consists in the construction, arrangement and combination of the various parts of my pressure and vacuum control valve, whereby the objects contemplated are attained, as hereinafter more fully set forth, pointed out in my claims, and illustrated in the accompanying drawings, in which:

Figure 1 is a diagram, illustrating an installation embodying my invention.

Figure 2 is a vertical, sectional view through a pressure and vacuum control valve embodying my invention.

Figure 3 is a vertical, sectional view taken at right angles to the view shown in Figure 1, illustrating. the controlling mechanism of the valve; and

Figure 4 is a horizontal, sectional view taken on the line 44 of Figure 2.

A valve of the type, which is particularly the subject matter of the present application has a great variety of uses, wherever it is desirable to control vacuum or pressure, and especially where it is desired at times to regulate vacuum and at other times to regulate pressure in the same line.

I will here describe my invention as installed in connection with an oil well. It will, however, be understood that this particular environment of the valve is suggested simply for purposes of illustration, and that I do not want to limit my valve to any particular use.

It is well known that in many oil wells, the oil flows under pressure for a time and in the course of time, the pressure is reduced and the oil is drawn out or handled by means of a pump. Ordinarily, the oil is supplied to a tank or tanks.

It is obvious that it is not desirable to subject the tanks to just ordinary pressure from 5, 1926. Serial No. 146,418.

the well, nor too great vacuum created by {he pump, on account of the liability of colapse.

My valve, in the installation now to be described, will serve to prevent excessive --pressure on the tank either Within or without, due to pressure from the oil well or to vacuum created by the operation of a pump. In the drawings herewith, wherein have illustrated an embodiment of my invention,

I have usedthe reference numeral 10 to indicate generally an oil well from which a pipe 11 conducts oil to a tank 12. The tank 12 has the outlet pipe 13. A branch pipe 14 leads from the pipe 11 to a pipe 15. In the pipe 11 between the pipe 14 and the tank 12 is an ordinary control valve 16. A by-pass pipe 17 is connected with the pipe 11 between the tank 12and the valve 16 and with the pipe 14.

My improved pressure and vacuum valve A is placed in the pipe 14. In the pipe 14 between the valve A and the tank 15 is a valve 18. A pump 19 discharges to the pipe 17 and has its intake connected by a pipe 20 with the pipe 14 between the valves A and 18. In t e pipe 20 is a valve 21.

I will now describe in greater detail my improved pressure and vacuum control valve A. p

This valve A has an ordinary body or casing 22, provided with the intake port 23 and the outlet port 24. On the interior of the casing 22 is the partition member 25, having t e valve seats 26 and 27. The partition 25 divides the interior of the valve cas ing 22 into what I shall call for convenience the intake compartment 28 and the outlet compartment 29.

Valves 30 and 31 connected by a post 32 coact with the valve seats 26 and 27 At what may be called the top of the valve casing 22 is an opening 32, for which there is provided a cover plate 33 secured by bolts 34 to the casing and provided with a central hole 35 from which projects the internally screw-threaded sleeve 36.

I provide a diaphragm casing made in two parts. The lower half 37 of the diaphragm casing has a tubular extension 38 screwed into the sleeve 36, as h wn in Figure 2. The casing member 37 has a passage 39 extending through it and the tubular extension 38 corunicating with the openings 35 edge of the 41 is loolted to the flange 46.

us periphery of a le dial c 1 between the 13.:

i may formed extension 48, pro ecting through he d anhragm.

@n what is under side of the diaphragm when the parts in the position shown in Fi ure 2 is a pla e 49 held in place against the diaphragm by a small washer 50 on the portion 48 ot the stem 47 and a suitable lock nut 51.

@n the stem portion 48 on the other side or the diaphragm is a plate or the like 52. held in place against the diaphragm by lock nuts 53 on the valve stem extension 48.

The extreme end of the extension 48 is screwed into a spring post 54, which proects into the spring casing 45, as shown.

Un the plate 52 are projecting feet 55. Slidably mounted on the spring post 54 is a spring seat 56, having the opposite, parallel arms 57 projecting alongside the spring post 54. At their upper en s, the arms 57 support and are connected by a ring 58. 1

Threaded into the upper closed end 46 of the spring 45 is an ad usting screw 59. On

the lower end of this screw are spaced nuts 60 and 61. Received between the nuts .60 and 61 on the screw 59 is the end member 62 of a yoke having the arms 63, extending downwardly and projecting just inside the ring 58, and having the outwardly extendmg feet 64 at their lower ends.

The screw 59 is rotatable in the yoke member 62 and I preferably interpose' between the yoke member 62 and the respective nuts 60 and 61, the ball bearings 65 and 66. It will be seen that the arms 63 0t the yoke just mentioned may slide in the ring 58. The arms 63 are provided with inwardly pro ectlng opposite lugs 67 substantially spaced from the feet 64.

On the upper end of the spring post 54 is a nut .68. lidably mounted on the post 54 1s a nut 69, arranged below the lugs 67 A sprmg 7 0 is mounted on the post 54 between the seat 56 and the washer 69.

The parts are so arranged that the yoke neaasaa cset. moving r ind carrying with it he yoke .y w i hrs 62 and 63,

which may be called the yoke 15.

The ts are so shaped and arranged that the lugs 67 engage the washer 69 for compressing the spring 70 and slicing the spring seat 56 against the feet 55, and thus forcing the diaphragm 44 downwardly and toward the valve casing 22. ting ot the valves 30 and 27. I

The adjustment may he made for regulating the pressure in the tank 12 at anydesired point.

Assuming then that the pressure in the well forces the oil throu h the pipe 11 to the tank 10, it will be seen that oil will flow into the pipe 14 to the valve A, and this pressure maintaining a pressure constantly at any given point, permitting the excess to be relieved when the valve is open.

As illustrative of how my valve may be used for controlling vacuum, it may be noted that in the history of oil wells, the pressure usually goes down after a. short time, and it becomes necessary to pump the oil.

Assuming then rived, and that the valves 18 and 16 are closed for operation by the pump, then the valve A is readjusted. The screw 59' isactuated for moving the parts tion illustrated in Figure 2 for instance to that illustrated in Figure 3.

As the yoke B moves upwardly, the lugs 67 leave the washer .69 and the feet 64 and engage the ring 58, whereupon the seat 56 is that this condition has a rfrom the posi- 7 This results in the setpulled upwardly, compreming the spring against the washer 69 and raising the post 54 and the diaphragm, and thus opening the valves 30 and 31. 7

When the pump is operated, the oil is drawn from the pipe 11 through the valve A, and the pipe 20, and through the pump, and thence is forced through the tanks 12 and 15.

Whenever the vacuum becomes so great, that the atmospheric pressure in the upper part of the diaphragm chamber is suflicient to overcome the spring tension, the diaphragm will be forced downwardly, and the valves closed and held closed until the vacuum decreases to the point for which the valve A is set. I

It is thus impossible to impose such vacuum on the tanks as would cause them to collapse or on the well as to injure it.

I claim as my invention:

1. In a pressure and vacuum control valve, a valve casing, a partition therein, dividing the easing into inlet and outlet compartments, having a valve port and seat, a valve for cboperating with said seat, a casing having therein a pressure sensitive member connected with the valve and subject on one side to the pressure 1n one compartment of the valve casing, a'spring operatively connected the easing into inlet and outlet compartments, having a valve port and seat, a valve for cooperating with said seat, a casing having therein a pressure sensitive member connected with the valve and subject on one side to the pressure in one compartment of the valve casing, and adjustable means for yield ingly impelling the pressure sensitive member to position for holding the valve open or closed, according to the adjustment of said means, said means comprising a post connected with said member having a head and a washer, a spring seat slidable on the post adapted to engage the said member, a spring on the post between the seat and the washer, an adjusting screw, yokes on the screw and seat slidably connected and havin means for preventing their separation, an means on the screw yoke for coacting with said washer for compressing the sprin Des Moines, Iowa, Octo er 12, 1926.

LYLE W. BROWNE. 

